SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 4)
   ExpressionList (children 3)
    Identifier arr1
    Identifier arr2
    Function count (alias c) (children 1)
     ExpressionList
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Subquery (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 2)
         SelectQuery (children 1)
          ExpressionList (children 2)
           Function emptyArrayUInt8 (alias arr1) (children 1)
            ExpressionList
           Literal Array_[UInt64_1] (alias arr2)
         SelectQuery (children 1)
          ExpressionList (children 2)
           Literal Array_[UInt64_1]
           Function emptyArrayUInt8 (children 1)
            ExpressionList
   ExpressionList (children 2)
    Identifier arr1
    Identifier arr2
   ExpressionList (children 3)
    OrderByElement (children 1)
     Identifier c
    OrderByElement (children 1)
     Identifier arr1
    OrderByElement (children 1)
     Identifier arr2